2011 YAMAHA BANSHEE 350 Owners Manual

8-27
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8. Remove the mixing chamber cap securing
plate by removing the screw.9. Loosen the carburetor joint screws.
1. Air filter case cover
2. Air filter case cover holder
1 2 2

1. Mixing chamber cap securing plate
2. Screw
21

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10. Remove the mixing chamber cap.
11. Remove the throttle cable from the throttle
valve, and then remove the throttle cable hold-
er by removing the screws.
1. Joint screw
1
11
1

1. Throttle cable
2. Throttle valve
3. Throttle cable holder
4. Screw
1
2
3 4

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12. Remove the carburetor, and then remove the
float chamber by removing the screws.
13. Remove the float and needle valve.
1. Float chamber
2. Screw
1
2 2
2
2

8-30
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14. Change the main jet and the jet needle clip po-
sition.
TIP


Optional main jets can be obtained at a Yamaha
dealer.

After the jet needle clip position is changed, the
throttle cables may need to be adjusted.
Assembling and installing the carburetors
Assemble and install both carburetors by the fol-lowing steps.
1. Install the needle valve and float.
2. Install the float chamber by installing the
screws.
3. Install the carburetor and tighten the joint
screws.
4. Assemble the throttle valve.
5. Install the mixing chamber cap, and then tight-
en it securely to the specified torque.
6. Install the mixing chamber cap securing plate
by installing the screw.
NOTICE:
Be sure to
match one of the projections on the carbu-
retor cap with one of the slots on the se-
curing plate. If the securing plate does not
match a projection, tighten the carburetor
cap until they align. Do not loosen the car-
buretor cap.

[ECB00502]

1. Float
2. Needle valve
3. Main jet
1
2 3

Tightening torque:
Mixing chamber cap:
4 Nm (0.40 m·kgf, 2.9 ft·lbf)

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7. Tighten the mixing chamber cap securing
plate screw to the specified torque.
8. Tighten the carburetor joint screws.
Adjusting the throttle cables
1. Move the throttle lever a few times.
2. Push the throttle lever forward until it stops
and hold it in this position.
3. Check through each carburetor window to see
if the punch mark on the throttle valve is at the
specified position.
4. If not, loosen the locknut and turn the adjust-
ing nut until the specified position is obtained.
1. Mixing chamber cap securing plate
2. Projection
3. Slot
4. Screw
Tightening torque:
Mixing chamber cap securing plate screw:
3.5 Nm (0.35 m·kgf, 2.5 ft·lbf)
12
3
4

1. Punch mark
2. Specified position: 0–1mm
1
2

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5. Move the throttle lever a few times and re-
check the position.
6. Install the fuel tank, side cover, radiator cover
and air filter case cover.
7. Connect the fuel hose to the fuel cock.
8. Install the seat.
EBU24020
Adjusting the engine idling speed
The engine idling speed must be checked and, if
necessary, adjusted as follows at the intervals
specified in the periodic maintenance and lubrica-tion chart.
TIP


A diagnostic tachometer is needed to make this
adjustment.

The carburetor synchronization and the throttle
cable free play must be checked, and adjusted if
necessary, before adjusting the engine idling
speed.
1. Start the engine and warm it up.
TIP

The engine is warm when it quickly responds to the
throttle.
2. Attach the tachometer to the spark plug lead.
3. Turn in both pilot air screws until they lightly
seat.
4. Turn out both pilot air screws to specification.
(See the “Changing the carburetor settings”
section on the page 8-23.)
1. Adjusting nut
2. Locknut
1
2

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5. Remove the seat. (See page 4-11.)
6. Check the engine idling speed and, if neces-
sary, adjust it to specification by turning the
throttle stop screws at the carburetors. To in-
crease the engine idling speed, turn the throt-
tle stop screws in direction (a), and to
decrease it, turn the screws in direction (b).NOTICE
ECB00510

The throttle stop screws were preset at the
factory. When adjusting the idling speed,
turn both throttle stop screws the same
amount, otherwise the carburetor synchroni-
zation will be incorrect.

Adjusting the pilot air screws and the idling
speed are separate procedures, but they
must be adjusted at the same time to achieve
1. Pilot air screw
1

1. Throttle stop screw
Engine idling speed:
1450–1550 r/min
1
(b)
(a)
(a)
(b)

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optimum engine performance.
TIP

If the specified idling speed cannot be obtained as
described above, have a Yamaha dealer make the
adjustment.
7. Install the seat.
EBU24047
Adjusting the throttle lever free play
The throttle lever free play should be checked and,
if necessary, adjusted at the intervals specified in
the periodic maintenance and lubrication chart.
The throttle lever free play should measure
4.0–6.0 mm (0.16–0.24 in) as shown. Periodically
check the throttle lever free play and, if necessary,
adjust it as follows.
TIP

The engine idling speed must be checked, and ad-
justed if necessary, before adjusting the throttle le-
ver free play.
1. Slide the rubber cover back.
2. Loosen the locknut.
3. To increase the throttle lever free play, turn
the throttle lever free play adjusting bolt in di-rection (a). To decrease the throttle lever free
play, turn the adjusting bolt in direction (b).
4. Tighten the locknut.
5. Slide the rubber cover to its original position.
EBU29601
Brakes
Replacement of brake components requires pro-
fessional knowledge. Brake service should be per-
formed by a Yamaha dealer.
1. Rubber cover
2. Throttle lever free play adjusting bolt
3. Locknut
4. Throttle lever free play
2
3
4
(a)(b)
1